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Vulcain Cricket (S2315A cal.120)

swiss2k
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mikepilk Distinguished Member

mikepilk

Posted
Posted
41 minutes ago, Klassiker said:

Yep, that's fine. Not centred, but that's not causing the OP's problem. For some reason I couldn't zoom in with anything like that resolution.

Using Google Chrome, right click on the image, then "Open Link in new window".  You can then zoom in to the original pic size

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swiss2k Watch Enthusiast

swiss2k

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Posted (edited)

@AmmarHello. Yes I did. This is the second time now and I've done it a bit differently this time. 

Personally I think that the power distribution/travel is poor on this movement, and that the balance wheel perhaps should be a bit heavier (to react less to changes). 

This time I cleaned the leaving daylight out of the main spring and the whole power train. Before installing the spring I used Molykote DX paste and applied super thin coat on it (first time I just added some oil on top of the assembled spring inside the barrel in several spots).  To maybe smoot-out/dampen the movement of the spring? 

Judging by the timegrapher, movement runs smoother, but still I notice some acceleration/deceleration with the balance wheel. With lowest 308 and highest 347 amplitude, witch results in -7...+5 s/d.  But those jumps are pretty rare, most of the time it runs around 320-322 and -1...0s/d. 

Maybe if I could record for a longer period of time the changes and fine the time between the pics, that might shine some light where the defect might be. Maybe there is some wear on one side of the pivot? 

Honestly not sure if its worth it, as I spent already quite a lot time fiddling with this watch.

What do you guys think? 

 

014EC295-D157-4E38-8573-1302623C8AAC.jpeg

 

3DE9F819-7C60-4D7E-A2A0-0C8DBA761405.jpeg

FD8AF221-732E-4059-9446-BCB9C75A5412.jpeg

Edited by swiss2k
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mikepilk Distinguished Member

mikepilk

Posted
Posted
47 minutes ago, swiss2k said:

@AmmarHello. Yes I did. This is the second time now and I've done it a bit differently this time. 

Personally I think that the power distribution/travel is poor on this movement, and that the balance wheel perhaps should be a bit heavier (to react less to changes). 

This time I cleaned the leaving daylight out of the main spring and the whole power train. Before installing the spring I used Molykote DX paste and applied super thin coat on it (first time I just added some oil on top of the assembled spring inside the barrel in several spots).  To maybe smoot-out/dampen the movement of the spring? 

Judging by the timegrapher, movement runs smoother, but still I notice some acceleration/deceleration with the balance wheel. With lowest 308 and highest 347 amplitude, witch results in -7...+5 s/d.  But those jumps are pretty rare, most of the time it runs around 320-322 and -1...0s/d. 

Maybe if I could record for a longer period of time the changes and fine the time between the pics, that might shine some light where the defect might be. Maybe there is some wear on one side of the pivot? 

Honestly not sure if its worth it, as I spent already quite a lot time fiddling with this watch.

What do you guys think? 

What do I think? I wonder what you are trying to achieve?

You have achieved chronometer standard from a fairly standard watch movement. I've had few watches which run that well. 

Well done.

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swiss2k Watch Enthusiast

swiss2k

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Hello @mikepilk. Thank you for the kind words.

Maybe I was not clean in my text. What I want is it to stop jumping from 308 to 347 degrees back and forth.  😃 

An interesting observation. When I set the movement dial side up in the timegrapher, amplitude is higher, beat error is lower and overall seems to run much better. 

Magic!

E564EDC4-8AC1-4C4E-A266-01529DC33B27.jpeg

Edited by swiss2k
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